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Scorching goIITian

Joined:	7 Dec 2007
Post:	211

8 Mar 2008 15:33:03 IST

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no. of valence electron...???plz. solve it

None

no. of valence electron...???plz. solve it

1.if N is avogadro's number then number of valence electrons in 4.2g of nitride ion(N3-) is

1.2.4N

2.4.2N

3.1.6N

4.3.2N

ans:2.4N

plz. explain how???

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Comments (2)

LAMPARD

Blazing goIITian

Joined: 1 May 2007

Posts: 777

8 Mar 2008 15:45:53 IST

Like 3 people liked this

No. of valence ele. in N is 5....N3- will have 8.
In 4.2 gms,(4.2/14)*N no. of atoms are present..each N3- atom has 8 electrons...so total no. of valence elec.=(4.2/14)*8*N...
hope u got it

rakhi agrawal

Scorching goIITian

Joined: 7 Dec 2007

Posts: 211

8 Mar 2008 15:53:18 IST

Like 0 people liked this

thanks.i got it

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